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Old 11th Feb 2010, 10:03 pm   #149
Ed_Dinning
Dekatron
 
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,171
Default Re: The "Sussex" Homebrew Valve Tester.

Hi David, I think it may have been mentioned in an earlier thread. There is a bridge rectifier in the meter, this sorts out the polarity of the supply but is part of the problem if you try to measure the "supply" supply.

Ed
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